Apparatus for pug making



l ug- 31, 1943 A. c. JAECKEL 2,328,071

APPARATUS FOR PUG MAKING Y Filed July 3, 1941 2 Sheets-Sheet l Flai.

Add/Jh c raecm INVENTOR. W M Anomax Aug.31, 1943. A. c. JAECKELAPPARATUS FOR PUG MAKlNG Filed July 3, 1941 4 2 Sheets--Sheet 2 ATTomaat Patented -Aug. 3l, 1943 APPARATUS FOR PUG MAKING `Adolph canJaeekel, Milwaukee, wis., assignor t6 A. 0.` Smith Corporation,Milwaukee, Wis., a corporation of New York Application July `s, 1941,serial ivo.` 400,976

2 Claims.

This invention relates to an `improved pug making press. 1 I Cylindricalpugs of plasticmaterialin varying sizes are utilized" in extrusionpresses inthe coating of welding Objects;` f

Heretofore, pugs have been made in various ways, one ofthe principalways beingfto employ a'press `in which 4the `pugging cylinder visdisposed below the -power cylinder. Positioning these cylinders in thismanner requires apress of! considerable height `and weight, as the pug'-ging piston must be capable of being raised above the upper end of' thepuggingcylinder to make such end; accessible for loading purposes.Withthe piston above the, cylinder duringloading there was,considerableuda'nger of injury to the operator. 1

Also in the old type of press the pugging cyllnder was provided with a`sliding bottom` to permit the formed pug to drop to the floor forremoval which was at aninconvenient `heightior the operator of themachine. I I y The main object of the present invention is to provide`an improved pug making `press which will eliminate the dra-Wbacksof theformer types o1 presses and which `is morecompact,` more eicient andless costly to operatethan the presses `heretofore used. I v I q fGenerally speaking the invention comprisesa `machine wherein the `powercylinder andpiston electrodes and other similar;u

from the following description and 'the accompanying drawingsin which: II

Figure 1 is a front'ele'vati'on showing a press embodying the'invention,- part of which has been broken and sectioned away to .shewits construction; y

Fig. 2f is a head of. the pugg-ing cylinder in closed position;

Fig. 3 is a detailed view showing the-head in open position; and I lFig. 2lis a longitudinal of thepuggingpiston.`

` The pug making press shownby the'drawings comprises standards `lcarrying a vertically disposed hydraulic or power cylinder 2 located inaxial `alignment below`a` vertically disposed puggingcylinder 3,supported by the power cyl` inder. I

Power piston 4 is reciprocably disposedinhy` draulic cylinder, andpugglin'g piston 5 is adapte` central sectional view Ned forreciprocation in puggihg cylinder` `3'. vA

pugging piston 5 causing power are `located below lthe pugging pistonandcyl index'. These pistons are` connected `by a com mon piston rodcausing the pugging piston to be driven by the power piston. y

A removableheadis 'provided to close the top of the pugging cylinder andthe removallof `this head permits the operator to load and unload thepugging cylinder and yet it is so constructed that it is held as aseal'tight cover on the top of `the pugging cylinder when closed. Thehead is hinged to the cylinder and is held in place by tension memberswhich are pivoted to the cylinder` support and linked to the head toprovide "for tilting of the head on its hinge.

`With the machine constructed in this` manner the operator can performthe loading and unloading operations at a convenient height without anyoverhead apparatus to hinder him,

' thereby saving` time and increasing production.

This type of construction facilitates cleaning operations, as thepugging piston can be either withdrawn from the lower end of itscylinder or raised above the top end.

Other objects of this invention will be ,apparent common Ypiston rod 6connects power lpiston 4 to ciprocablydrive bugging piston 5. 4Hydraulfic'cylinder 2 is double acting and has a head 1 at its lowerVend Withafsuitableaperture 8 foi" connection with a source Volf uidpower. rIhe upper end of the hydraulic cylinder 2` is closed by a head 9and is provided with an vape'r` ture I0 above the piston 4 forconnection with a source of fluid power. Hydrauliccylinder 2 at its topis attached to standards Ibyscrews Il and keys Il `Packing materialorfgland I3 encases Piston rody l6, where it passes through` head 9, `toprevent leakage of fluid from hydraulic cylinder2. -I

Bolts `I4 pass through earson the lower flanged end I5 of cylinder-.1.3,head 9 and the upper flanged Aend `of cylinder 2 lto secure-the partstogether. Spi'icerslet-:ves` I6` encircle the bolts intermediate thecylinder 3 and head 9 to maintain the cylinder 3 in spaced relationabove cylinder 2 and thus permit withdrawal of pugging piston 5 from thebottom of cylinder 3, as shown in Figure 1, and allowthe operator toexamine and` clean the cylinder and piston. Angular webs Il reenforcethe ilange at the lower end of cylinder 3.

Pugging cylinder 3 has a removable top head sired.,l Pivotal arms 2i)`linked to the top of head I8 by bifurcated link 2l and secured tostandards I by pins 22, serve as a, pair of tension members sideelevation of the "press with the` to sustain the pressure against headI8 when the pugging process is in operation. Other suitable methods ofsecuring head I8 to the upper end of pugging cylinder 3 may be employed.f

Pugging piston 5 consists of a metallic head or top 23 attached to thebottom 24 by a bolt 25. Bolts 26 connect the pugging piston 5 to pistonrod 6. Packing material 21 serves as a wiper or cleaning means when thepiston is operating in its cylinder.

On the bottom of pugging piston 5 is located a circumferential skirt 28which may be formed by providing an annular groove 29 between the rim ofthe piston 5 and piston rod 6; The purpose of the circumferential skirt2.8 is to prevent leakage fluid that may be squeezed or expressed fromthe material being pugged or water used in cleaning the cylinder fromreaching piston rod 6;

When leakage :duid reaches circumferential skirt 28 its passage towardpiston rod 6 is obstructed and it either runs down the cylinder wall ordrips into recep-tor 30 positioned on the rhead 9 of power cylinder 2.Leakage uid from the cylinder wall also drips into the receptor.

Receptor 3D may be of annular trough shape having an inner generallyconical flange 3l loosely encircling the piston, rod. A drain pipe 32 isconnected to the trough for carrying off the leakage fluid. k

In the operation of the machine shown and described, head I8 is firstremoved or swung back from the top of pugging cylinder 3. Fluid is thenforced into the bottom of power cylinder '.2 through aperture 8 causingpower piston 4 to be pushed upwards. The movement of power piston 4upwards advances pugging piston 5 into the lower end of pugging cylinder3 by means of the connecting or common piston rod 6,

After pugging piston 5 enters pugging cylinder 3 itsupward movement isstopped by the withholding of further entry of uid into the bottom ofpower cylinder 2 to permit the loading of the plastic material throughthe open` top of pugging cylinder 3. When such loading has beencompleted head I8 is closed over puggng cylinder 3 and the toggle linksformed by` pivotal arms 20 linked to head I3 by links 2| and to framevlby pins 22 are pushed into place to securely seal head I8 on the top ofpugging cylinder 3. k f

Pugging piston 5 supporting its plastic content is then advancedupwardly toward head I8 by the forcing of more fluid into the bottom ofpower cylinder 2, until the material in cylinder 3 is pressed into a pugof the desired consistency. The pressurein cylinder 2 is thenreleased,the toggles links loosened, the head I8 swung back and reducedpressure applied to cylinder 2 to raise the pug out of cylinder 3, whereit will be conveniently accessible to the operator,

When the pug has been removed the pugging piston 5 is lowered to thebottom of the pugging cylinder 3 by the entry of pressure fluid throughaperture I3 at the top of power cylinder 2 above piston 4 and exhaustingthe fluid out of the bottom of power cylinder 2 through` aperture 8.After the pugging piston 5 is lowered to its position in the bottom ofthe pugging cylinder 3, as shown in Fig. 3, the operator reloads thecylinder 3 and replaces the head I8 for repeating the pugging operation.

While the above described operation is in process uid squeezed out ofthe material being pugged leaks by piston 5 and is prevented fromreaching the piston rod b-y skirt 28. The uid .runs down the cylinderwall and drips into receptor 3l! or if the piston is withdrawn from thebottom of its Cylinder the uid will drip directly from the skirt 28.Fluid in the trough will be drained through connection 32.

After a number of pugging operationsA have been completed, puggingpiston 5 may be either raised above the upper end of cylinder 3, orwithm drawn from the bottom of the cylinder so that the apparatus may bethoroughly Vinspected and cleaned before further operations are resumed.

I claim:

l. In a machine of the class described, a cylinder having a pistonoperating therein through one end thereof, a support for said cylinder,a removable head for said cylinder hinged to one side thereof fortipping out of the way to provide for loading the cylinder with materialto be compressed, and a toggle link having a shorter member pivoted tosaid head above and near the center thereof and a pair of longer memberspivoted to said cylinder support on opposite sides of the cylinderconstituting tension'members to secure the head tightly against thecylinder when closed and relieving said hinge from substantial pressure.

2. In amachine of the class described, a cylinder, a support for saidcylinder, a removable head for said cylinder hinged toone side thereoffor tipping out of the way to provide for loading the cylinder withmaterial to be compressed, and a toggle link having 'a Yshorter memberpivoted to said head above and near the center thereof and a pair oflonger members pivoted at their upper ends to said shorter member and attheir lower ends to said cylinder support on opposite sides of thecylinder constituting tension members to secure the head tightly againstthe cylinder when closed and relieving the hinge from substantialpressure, said pivot point between the toggle members being laterallymovable to provide for lifting said head and tilting the same on itshinge.

ADOLPH C. JAECKEL.

